21869720

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8963}}^1$

素因数の和:9035

約数の個数: 32

約数和(自身を含む): 50019120

約数和(自身を除く): 28149400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8963, 17926, 35852, 44815, 71704, 89630, 179260, 358520, 546743, 1093486, 2186972, 2733715, 4373944, 5467430, 10934860, 21869720]

約数ペア:

[(1, 21869720), (2, 10934860), (4, 5467430), (5, 4373944), (8, 2733715), (10, 2186972), (20, 1093486), (40, 546743), (61, 358520), (122, 179260), (244, 89630), (305, 71704), (488, 44815), (610, 35852), (1220, 17926), (2440, 8963)]